1 files changed, 40 insertions, 0 deletions
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..a1c08c9
--- /dev/null
+++ b/main.c
@@ -0,0 +1,40 @@
+#include "types.h"
+#include "param.h"
+#include "mmu.h"
+#include "proc.h"
+#include "defs.h"
+#include "x86.h"
+
+char junk1[20000];
+char junk2[20000] = { 1 };
+
+main()
+{
+  struct proc *p;
+
+  cprintf("\nxV6\n\n");
+
+  // initialize physical memory allocator
+  kinit();
+
+  // create fake process zero
+  p = &proc[0];
+  p->state = WAITING;
+  p->sz = PAGE;
+  p->mem = kalloc(p->sz);
+  memset(p->mem, 0, p->sz);
+  p->kstack = kalloc(KSTACKSIZE);
+  p->tf = (struct Trapframe *) (p->kstack + KSTACKSIZE - sizeof(struct Trapframe));
+  memset(p->tf, 0, sizeof(struct Trapframe));
+  p->tf->tf_es = p->tf->tf_ds = p->tf->tf_ss = (SEG_UDATA << 3) | 3;
+  p->tf->tf_cs = (SEG_UCODE << 3) | 3;
+  p->tf->tf_eflags = FL_IF;
+  setupsegs(p);
+
+  p = newproc(&proc[0]);
+  // xxx copy instructions to p->mem
+  p->tf->tf_eip = 0;
+  p->tf->tf_esp = p->sz;
+
+  swtch(&proc[0]);
+}